<h4>Command Line</h4>
<pre><code>
player [-ao null] [-vo qt|gl|d2d|gdi|xv] [-vd "dxva[;cuda[;vaapi[;vda[;ffmpeg]]]]"] [--ffmpeg-log] [-f url|path|pipe:]
</code></pre>
<p>To disable audio output, add <code>-ao null<code></p>
<p>Choose a render engine with <em>-vo</em> option(default is OpenGL). For example, in windows that support Direct2D, you can run</p>
<pre><code>player -vo d2d filename</code></pre>
<p>To select decoder, use <code>-vd</code> option. Value can be <em>dxva</em>, <em>cuda</em>, <em>vaapi</em> and <code>ffmpeg</code>, or a list separated by <em>;</em> in priority order. For example:
<pre><code>player -vd "dxva;cuda;ffmpeg" filename</code></pre>
</p>
<p>
will use dxva if dxva can decode, use cuda if dxva failed to decode, and use ffmpeg if cuda can not decode.
</p>
<h4>Shortcuts</h4>
<ul>
<li>Double click: fullscreen switch</li>
<li>Ctrl+O: open a file</li>
<li>Space: pause/continue</li>
<li>A: aspect ratio</li>
<li>F: fullscreen on/off</li>
<li>T: stays on top on/off</li>
<li>N: show next frame. Continue the playing by pressing "Space"</li>
<li>O: OSD</li>
<li>P: replay</li>
<li>Q/ESC: quit</li>
<li>S: stop</li>
<li>R: rotate 90</li>
<li>M: mute on/off</li>
<li>Up / Down: volume + / -</li>
<li>Ctrl+Up/Down: speed + / -</li>
<li>-&gt; / &lt;-: seek forward / backward</li>
<li>Ctrl+Wheel: zoom in/out</li>
<li>Drag and drop a media file to player</li>
</ul>

<p>read wiki for more information: <a>https://github.com/wang-bin/QtAV/wiki/_pages</a><p>
